Liam completed his PhD in Professor Norman Saunders' laboratory at the University of Melbourne, investigating the permeability of medicines across the blood-brain barrier at different stages of development. He then undertook a postdoctoral fellowship in Professor Barbara Stonestreet's laboratory at the Women and Infants Hospital of Rhode Island and Brown University, where he investigated the efficacy and mechanism of action of a novel treatment for neonatal hypoxic-ischemic brain injuries. In 2022 Liam Joined the Nicolazzo laboratory where he investigated changes to the blood-brain barrier in glioblastoma multiforme and disease pathophysiology and novel treatment efficacy for amyotrophic lateral sclerosis. In 2024 Dr. Koehn was awarded the FightMND Early Career Research Fellowship to investigate neuroinflammation in amyotrophic lateral sclerosis. 

In the Nicolazzo laboratory, Liam will investigate changes to the blood-brain barrier in glioblastoma multiforme in order to determine novel means of improving delivery of chemotherapeutics to the brain in this disease.